.welcome {
    width: 600px;
    height: 360px;
    position: relative;
    background-image: url(../img/img/start_bg.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    text-align: center;
    display: flex;
    align-items: center;
    flex-direction: column;
    /* border: 50px solid white; */
}

.welcome .start-btn {
    width: 100px;
    height: 100px;
    margin-top: 200px;
    background: url(../img/img/start_btn.png) no-repeat center center/100% 100%;
    border: none;
}

.welcome .start-btn:hover {
    width: 110px;
    height: 110px;
}

